Cessna 172 G1000 - Why I do not see distance in NM to next VOR point?

First thing I’d check is to see if it’s a VOR/DME or just a VOR. Not all VOR’s have a DME capability. If the one you’re headed toward has DME capability, press the PFD Opt softkey, then push bearing one or two to match nav 1 or 2 radio or gps to show distance.
Regards